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GENERAL56451
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GENERAL56451
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Last modified
8/24/2016 8:40:51 PM
Creation date
11/23/2007 11:28:55 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1976032
IBM Index Class Name
General Documents
Doc Date
3/21/2001
From
USFS
To
DMG
Media Type
D
Archive
No
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<br />and intersected the bench located another 50 feet up slope. Placing rip rap at the toe of the scarp <br />will not alter the continuation of this process, as it is no longer fluvial but rather colluvial. <br />Therefore, we will not be doing any work at this specific site. <br />We aze requesting the CORPS provide us written documentation that the work completed to date <br />is consistent with the permit and that it is acceptable to the CORPS. It is recognized that the <br />project has been reduced significantly from that originally proposed and permitted. The CORPS <br />indicated that before they could provide comment back on the adequacy of the work they would <br />like a summarization of those changes and why they were necessary. Our rationale is provided <br />in this memo. In addition we are providing a marked up copy of the original drawings showing <br />how the completed work differs from the original proposal. The changes that were made were <br />documented in two memos to the Corps, the first da[ed November 14, 1997 and the second <br />December 4, 1998. <br />In our Environmental Analysis titled, "San Miguel River Restoration (Stabilization) Project, <br />Apn;, 19^^>5, five environmental iJSUi.J N'e:e ide.:c5ed that, 2t L~:e t:me, ini~~3ted the need for <br />action. <br />1. Accelerated streambank erosion and lowering of the water table have resulted in a loss <br />of, or impacts to, aquatic and riparian habitat. <br />2. Affects on the aesthetic values of the area. <br />3. Increased sediment delivery downsveam is currently impacting habitat and water <br />quality in the lower reaches. <br />4. The recreational fishery is being impacted due to a loss of habitat, sedimentation and <br />erosion. <br />5. The sveam has lost its "sediment transpoR capabilities" through the braided portions of <br />the channel. <br />Our decision was to implement an alternative that would <br />Rehabilitate and stabilize the South Fork San Miguel River and the mainstem San Miguel <br />River above its confluence with the South Fork; <br />Halt further headcutting of the channel by installation of grade control structures; <br />Reduce accelerated bank erosions; <br />Create a single channel and eliminate the braided pattern which now exists; <br />Enhance aquatic and riparian habitat quality; <br />Reduce the potential impact of furore flood damage; <br />Improve the visual, aesthetic ,biological and physical qualities of the riverine <br />environment. <br />
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